﻿// The MIT License(MIT)
//
// Copyright(c) 2021 Alberto Rodriguez Orozco & LiveCharts Contributors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

using LiveChartsCore.Drawing;

namespace LiveChartsCore.Motion;

/// <summary>
/// Defines the <see cref="LvcDropShadow"/> motion property class.
/// </summary>
/// <param name="defaultValue"></param>
public class DropShadowMotionProperty(LvcDropShadow defaultValue = null!)
    : MotionProperty<LvcDropShadow?>(defaultValue)
{
    /// <inheritdoc cref="MotionProperty{T}.CanTransitionate"/>
    protected override bool CanTransitionate => true;

    /// <inheritdoc cref="MotionProperty{T}.OnGetMovement(float)"/>
    protected override LvcDropShadow OnGetMovement(float progress)
    {
        var from = FromValue ?? LvcDropShadow.Empty;
        var to = ToValue ?? LvcDropShadow.Empty;

        if (from == to)
            return from;

        return new(
            from.Dx + progress * (to.Dx - from.Dx),
            from.Dy + progress * (to.Dy - from.Dy),
            from.SigmaX + progress * (to.SigmaX - from.SigmaX),
            from.SigmaY + progress * (to.SigmaY - from.SigmaY),
            new(
                (byte)(from.Color.R + progress * (to.Color.R - from.Color.R)),
                (byte)(from.Color.G + progress * (to.Color.G - from.Color.G)),
                (byte)(from.Color.B + progress * (to.Color.B - from.Color.B)),
                (byte)(from.Color.A + progress * (to.Color.A - from.Color.A))));
    }
}
